Display Circuit for Frame-Rate Synchronized Video Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display systems face synchronization continuity issues during video signal switching, leading to unstable synchronization and image distortion due to asynchronous image data inputs, which compromises display visual quality.
Innovation Solution
A circuit apparatus with a first and second input circuit, a frame memory, a selection circuit, and a control circuit that switches between image data in vertical blanking periods and adjusts frame rates to synchronize asynchronous image data, ensuring smooth transitions and high visual quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If asynchronous video signals are switched directly without synchronization adjustment, then switching speed is improved, but synchronization continuity deteriorates causing image distortion
Solution Approach 1:
The patent applies preliminary action by adjusting the frame rate of the second video signal before switching occurs. The control circuit modifies the frame rate of the second asynchronous video signal in advance so that its synchronization timing aligns with the first video signal at the moment of switching. This pre-adjustment ensures synchronization continuity is maintained during the transition, preventing image distortion while achieving rapid switching.
2Reliability
If frame rate adjustment is performed to synchronize video signals, then synchronization continuity is improved, but processing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the frame rate parameter of the second video signal. The control circuit dynamically adjusts this parameter to achieve synchronization with the first video signal. By changing only the frame rate parameter rather than the entire signal structure, the patent maintains synchronization continuity while minimizing processing complexity. The adjustment is performed through simple timing control rather than complex signal processing.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A first selection circuit switches from first image data to switching image data in a vertical blanking period of the first image data. An output circuit outputs output image data at a frame rate different from that of second image data in a switching period in which the switching image data is selected by the first selection circuit. The first selection circuit switches from the switching image data to the second image data in an overlap period between a vertical blanking period of the switching image data and a vertical blanking period of the second image data.